cancellation · noun C or U /ˌkæn.səˈleɪ.ʃən/
cancellation
C1 when someone decides that an event will not now happen or stops an order for something
Dictionary example:
a last-minute cancellation
Learner example:
To begin with, there was a general disappointment due to the cancellation of the opening speech. (Certificate in Advanced English; C1; Greek)